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A393640 as a simple table

na(n)
17
23
31
417
59
61
711
85
91
1013
113
121
1331
1419
151
1621
1711
181
199
203
211
2223
2313
241
2515
267
271
287
293
301
3127
3215
331
3417
355
361
3723
383
391
4049
4133
421
4335
4421
451
4615
473
481
4937
5023
511
5225
5313
541
557
563
571
5821
5911
601
6113
625
631
6417
653
661
6739
6825
691
7027
7115
721
7311
743
751
7629

[7,3,1,17,9,1,11,5,1,13,3,1,31,19,1,21,11,1,9,3,1,
 23,13,1,15,7,1,7,3,1,27,15,1,17,5,1,23,3,1,49,33,
 1,35,21,1,15,3,1,37,23,1,25,13,1,7,3,1,21,11,1,13,
 5,1,17,3,1,39,25,1,27,15,1,11,3,1,29]